【Android进阶学习】Http编程之HttpConnection

HttpURLConnection是继承于URLConnection类，二者都是抽象类。其对象主要通过URL的openConnection方法获得的。     

下面是具体的代码：

package com.llingdududu.url;  
 
import java.io.BufferedReader;  
import java.io.InputStreamReader;  
import java.net.HttpURLConnection;  
import java.net.URL;  
 
import android.app.Activity;  
import android.os.Bundle;  
 
public class URLConnectionActivity extends Activity {  
    String urlStr = "http://developer.android.com/";  
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.main);  
          
        try {  
            //实例化URL  
            URL url = new URL(urlStr);  
            //使用HttpURLConnection打开连接    
            HttpURLConnection httpConnection = (HttpURLConnection) url.openConnection();  
            //得到输入流对象  
            InputStreamReader in = new InputStreamReader(httpConnection.getInputStream());  
            BufferedReader bufReader = new BufferedReader(in);   
            String lineStr = "";  
            String resultStr = "";  
            while ((lineStr = bufReader.readLine())!=null) {  
                resultStr += lineStr + "\n";                  
            }  
              
            System.out.println(resultStr);  
            //关闭输入流  
            in.close();  
            //关闭连接   
            httpConnection.disconnect();  
        } catch (Exception e) {  
            // TODO Auto-generated catch block  
            e.printStackTrace();  
        }   
    }  
}